Lens-Maker Formula: A converging lens with the same curvature on both faces and a focal length of 25 cm is to be made from crown glass having a refractive index of 1.52. What radius of curvature is required for each face?
Fill in the blank(s) with the appropriate word(s).
26 cm
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The signature of a planet is largest in radial velocity measurements when the planet and star are lined up along the line of sight to the telescope
Indicate whether the statement is true or false
How does the Space Shuttle take off?
A) Its rocket engines push against the launch pad propelling the shuttle upwards. B) It converts mass-energy to kinetic energy. C) It achieves lift from its wings in the same way that airplanes do. D) Hot gas shoots out from the rocket and, by conservation of momentum, the shuttle moves in the opposite direction. E) The hot rocket exhaust expands the air beneath the shuttle, propelling it forward.
When light scatters from a rough surface, the law 
A. does not hold. B. holds on average, with reflected light from the surface leaving in the average direction of reflection. C. applies to each small relatively flat area of surface individually. D. applies only when the particle aspect of light predominates. E. applies only when the wavelength of light is greater than 800 nm but less than 2000 nm.
The law of poles states that like magnetic poles ______________ and unlike magnetic poles ______________
Fill in the blank(s) with correct word